Since when they were MiJ? I always assumed they were China, Korea, and Indo. They're supposed to be Japan's equivalent of the LTD line being more beginner and intermediate guitars.
I've seen a lot of old mik ones but I was really really surprised to come across a neck through horizon for like 300 euro that says it's made in Japan.
Agufish has a video (or two?) on youtube about them. I believe he's got a pink Les Paul copy, worth checking out. He also recommends a purchasing service (can't remember the name) whom you can use as a middle man to buy through. I think he spent ~$350.